-0.73% is the change from 549 to 545
Calculation steps:
[( 545 - 549 ) ÷ 549] x 100 = -0.73%
Formula
Percentage change = [(545 - 549) / 549] x 100
Subtract the new number by the original number
545 - 549 = -4
-4 ÷ 549 = -0.007285974499089253
-0.007285974499089253 x 100 = -0.73%